| 摘要 |
For production of NASICON type lithium iron phosphate particles, it is desired to increase the uniformity of the particle size and the chemical composition and further to improve the crystallinity. A process for producing lithium iron phosphate particles, which comprises a step of obtaining a melt containing, as represented by mol % based on oxides, from 1 to 50% of Li2O, from 20 to 50% of Fe2O3 and from 30 to 60% of P2O5; a step of cooling and solidifying the melt; a step of pulverizing the solidified product into a desired particle shape, and a step of heating the pulverized product in the air or under oxidizing conditions (0.21<oxygen partial pressure≰1.0) at from 350 to 800° C. to precipitate crystals of LinFe2(PO4)3 (0<n≰3), in this order.
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